| 摘要 |
<p>PURPOSE:To reduce the number of working processes and to improve economical efficiency by a method wherein two ends form a pipe coupling structure and pipe coupling structures for a flexible pipe are formed to the branch pipes of T-pipes arranged on the upper stream side and the downstream side through respective shutoff valves. CONSTITUTION:A strainer 3, a shutoff valve 5, and a T-pipe 9 are integrally intercoupled, in the order, in a position situated upper stream from a main valve 2, and a reducer 4, a shutoff valve 6, and a T-pipe 10 are intercoupled, in the order, in a position situated downstream from the main valve, and piping coupling structures 9a and 10a are arranged to the two ends thereof. Pipe coupling structures 11 and 12 are arranged to the branch pipes 9b and 10b of the T-pipes 9 and 10 through the shutoff valves 6 and 7, respectively. At a construction site, pipings on the upper stream side and the downstream side provided at respective terminals with pipe flanges coupled to pipe flanges 9a and 10a being the pipe coupling structures of the two ends of a piping unit 1 may be arranged with a distance therebetween being equal to the length of the piping unit 1, and work at a site is extremely facilitated.</p> |
